What changed
Half the input price and 58% less on output than GPT-5.6 Luna, with the same all-round score.
Compared with GPT-5.6 Luna · the model it replaces
Solves two in three hard coding tasks
DeepSWE 1.1 — fixing real bugs in real software projects
66.6%
✦ no GPT-5.6 Luna score published to compare
Same all-round score as the model it replaces
Artificial Analysis Intelligence Index — average of 10 hard tests
37
same as GPT-5.6 Luna
Costs about half as much as the model it replaces
Price per 1M tokens — what developers pay, input / output
$0.10 / $0.50
▲ down from $0.20 / $1.20 · output 58% cheaper
Where the GPT Luna line stands
GPT-6 Luna is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
Every GPT Luna release
Newest first. See the full line with every card →
- Sep 22, 2026GPT-6 Luna · this page
- Jul 9, 2026GPT-5.6 Luna
- Mar 17, 2026GPT-5.4 nano
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